<!--
 * @Author: your name
 * @Date: 2021-03-30 16:26:38
 * @LastEditTime: 2021-03-31 21:03:53
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: \element实战\element_ui\src\components\login.vue
-->
<template>
  <div class="login_container">
    <div class="login_box">
      <!--头像区域-->
      <div class="avatar_box">
        <img src="../assets/9969.gif_wh860.gif" alt="" />
      </div>
      <!--登录表单区域-->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!--用户名-->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="el-icon-user-solid"
          ></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="el-icon-lock"
            type="password"
          ></el-input>
        </el-form-item>
        <!--按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>


<script>
export default {
  data() {
    return {
      //这是登录表单的数据绑定对象
      loginForm: { username: 'admin', password: '123456' },
      //这是表单的验证规则对象
      loginFormRules: {
        //验证用户名是否合法
        username: [
          { requiered: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        //验证密码是否合法
        password: [
          { requiered: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    //点击重置按钮
    resetLoginForm() {
      //   console.log(this);
      this.$refs.loginFormRef.resetFields()
    },
    //表单登录前的预验证：先获取引用对象然后使用validate()方法预验证
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        //console.log(valid);
        if (!valid) return
        // const result = await this.$http.post("login", this.loginForm);
        // console.log(result);
        const { data: res } = await this.$http.post('login', this.loginForm)
        //console.log(res);
        //promise异步async await简化操作优化
        //await只能用在被async修饰的方法中
        //

        if (res.meta.status !== 200) {
          return this.$message.error('登陆失败')
        } else {
          this.$message.success('登陆成功！')
        }
        console.log(res)
        //1.将登录成功后的token，保存到客户端的sessionStorage中
        //1.1项目中登陆之外的API接口，必须在登录之后才能访问
        //1.2 token只应在当前网站打开期间生效，所以将tohomeken保存在sessionStorage中

        window.sessionStorage.setItem('token', res.data.token)
        // 保存数据到 sessionStorage
        //sessionStorage.setItem("key", "value");
        this.$router.push('/home') //router加push实现网页的跳转
        //随之自己需要把router配置完成
        //2.通过编程式导航跳转到后台主页，路由地址是/home
      })
    },
  },
}
</script>
<style lang="less" scoped>
//scoped防止样式冲突;
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>